Genetic information are carried in the form of long chain of molecules made-up-of _________?
Correct answer: C. Nucleotides
- A. Amino acids
- B. RNA
- C. Nucleotides
- D. Polypeptides
Explanation
Nucleic acids carry genetic information and are long chains formed by joining nucleotides, each containing a sugar, phosphate group, and nitrogenous base. Amino acids form proteins, whereas polypeptides are chains of amino acids. Students may choose RNA because RNA can carry genetic information in some viruses, but the question asks what these information-carrying molecules are made of.
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About Structure of DNA
DNA structure includes nucleotides made of deoxyribose, phosphate and nitrogenous bases, arranged in two antiparallel polynucleotide strands. Questions cover the double helix, phosphodiester and hydrogen bonds, complementary base pairing between adenine and thymine and between guanine and cytosine, and the significance of major and minor grooves.
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